ACSP Virtual Router Redundancy (VRRP) 5

Question 1

When the VRRP master's tracked uplink fails and its priority drops below a backup router's priority, what must be enabled for the backup to take over?

Accepted Answer

Preemption must be enabled on the backup router

Answer

Even with object tracking causing the master's priority to fall, the backup router will only preempt if preemption is enabled on that backup.

Question 2

What distinguishes an 'accept mode' configuration in VRRPv3 on Aruba switches?

Accepted Answer

Non-IP-owner master routers accept and respond to packets destined for the virtual IP

Answer

In accept mode, a VRRP master that does not own the virtual IP (non-owner) will still accept and process packets destined for the virtual IP address.

Question 3

Which of the following scenarios would cause a VRRP backup to NOT preempt the current master even though the backup has a higher priority?

Accepted Answer

Both A and B

Answer

A backup will not preempt if preemption is disabled on that router OR if the current master is the IP address owner (priority 255), which cannot be preempted.

Question 4

In a VRRP deployment, two routers share VRID 5 on VLAN 30. Router A (priority 150) is master. An administrator lowers Router A's priority to 80 via CLI without a reload. Router B has priority 100 and preemption enabled. What occurs?

Accepted Answer

Router B immediately preempts and becomes master

Answer

When Router A's priority drops below Router B's 100, Router B detects the lower-priority advertisement and preempts to become master since preemption is enabled.

Question 5

What is the purpose of configuring a 'preemption delay' in VRRP on Aruba switches?

Accepted Answer

To allow a higher-priority router time to populate its routing table before taking the master role

Answer

Preemption delay gives the preempting router time to converge its routing table or STP topology before it takes over as the active gateway, preventing traffic blackholes.

(ACSP) Aruba Certified Switching Professional Practice Test

(ACSP) Aruba Certified Switching Professional Practice Test

ACSP Virtual Router Redundancy (VRRP) 5